xref: /PHP-8.2/ext/bcmath/libbcmath/src/int2num.c (revision eb9ad31b)
1 /* int2num.c: bcmath library file. */
2 /*
3     Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
4     Copyright (C) 2000 Philip A. Nelson
5 
6     This library is free software; you can redistribute it and/or
7     modify it under the terms of the GNU Lesser General Public
8     License as published by the Free Software Foundation; either
9     version 2 of the License, or (at your option) any later version.
10 
11     This library is distributed in the hope that it will be useful,
12     but WITHOUT ANY WARRANTY; without even the implied warranty of
13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14     Lesser General Public License for more details.  (LICENSE)
15 
16     You should have received a copy of the GNU Lesser General Public
17     License along with this library; if not, write to:
18 
19       The Free Software Foundation, Inc.
20       59 Temple Place, Suite 330
21       Boston, MA 02111-1307 USA.
22 
23     You may contact the author by:
24        e-mail:  philnelson@acm.org
25       us-mail:  Philip A. Nelson
26                 Computer Science Department, 9062
27                 Western Washington University
28                 Bellingham, WA 98226-9062
29 
30 *************************************************************************/
31 
32 #include <config.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <ctype.h>
36 #include <stdarg.h>
37 #include "bcmath.h"
38 #include "private.h"
39 
40 
41 /* Convert an integer VAL to a bc number NUM. */
42 
43 void
bc_int2num(num,val)44 bc_int2num (num, val)
45      bc_num *num;
46      int val;
47 {
48   char buffer[30];
49   char *bptr, *vptr;
50   int  ix = 1;
51   char neg = 0;
52 
53   /* Sign. */
54   if (val < 0)
55     {
56       neg = 1;
57       val = -val;
58     }
59 
60   /* Get things going. */
61   bptr = buffer;
62   *bptr++ = val % BASE;
63   val = val / BASE;
64 
65   /* Extract remaining digits. */
66   while (val != 0)
67     {
68       *bptr++ = val % BASE;
69       val = val / BASE;
70       ix++; 		/* Count the digits. */
71     }
72 
73   /* Make the number. */
74   bc_free_num (num);
75   *num = bc_new_num (ix, 0);
76   if (neg) (*num)->n_sign = MINUS;
77 
78   /* Assign the digits. */
79   vptr = (*num)->n_value;
80   while (ix-- > 0)
81     *vptr++ = *--bptr;
82 }
83